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參數(shù)資料
| 型號： | LTC1922-1 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Synchronous Dual Mode Phase Modulated Full Bridge Controllers |
| 中文描述： | 同步相位調(diào)制的雙模式全橋控制器 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大小： | 319K |
| 代理商： | LTC1922-1 |
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LTC3722-1/LTC3722-2
Synchronous Dual Mode
Phase Modulated
Full Bridge Controllers
1
372212i
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Final Electrical Specifications
I
Adaptive or Manual Delay Control for Zero Voltage
Switching Operation
I
Adjustable Synchronous Rectification Timing for
Highest Efficiency
I
Adjustable Maximum ZVS Delay
I
Adjustable System Undervoltage Lockout and
Hysteresis
I
Programmable Leading Edge Blanking
I
Very Low Start-Up and Quiescent Currents
I
Current Mode (LTC3722-1) or Voltage Mode
(LTC3722-2) Operation
I
Programmable Slope Compensation
I
V
CC
UVLO and 25mA Shunt Regulator
I
50mA Output Drivers
I
Soft-Start, Cycle-by-Cycle Current Limiting and
Hiccup Mode Short-Circuit Protection
I
5V, 15mA Low Dropout Regulator
APPLICATIOU
I
Telecommunications, Infrastructure Power Systems
I
Distributed Power Architectures
I
Server Power Supplies
FEATURES
DESCRIPTIO
U
February 2003
The LTC
3722-1/LTC3722-2 phase shift PWM controllers
provide all of the control and protection functions neces-
sary to implement a high efficiency, zero voltage switched
(ZVS), full bridge power converter. Adaptive ZVS circuitry
delays the turn-on signals for each MOSFET independent
of internal and external component tolerances. Manual
delay set mode enables secondary side control operation
or direct control of switch turn-on delays.
The LTC3722-1/LTC3722-2 feature adjustable synchro-
nous rectifier timing for optimal efficiency. A UVLO pro-
gram input provides accurate system turn-on and turn-off
voltages. The LTC3722-1 features peak current mode
control with programmable slope compensation and lead-
ing edge blanking, while the LTC3722-2 employs voltage
mode control with voltage feedforward capability.
The LTC3722-1/LTC3722-2 feature extremely low operat-
ing and start-up currents. Both devices include a full range
of protection features and are available in the 24-pin
surface mount (GN) package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
C
IN
R1
LTC3722
V
IN
36V TO 72V
MA
ME
MF
MB
MC
MD
1/2
U1
1/2
U1
U2
L1
L2
RCS
T1
T2
C1
V
OUT
12V
C
OUT
3722 TA01A
U1, U2: LTC1693-1 DUAL GATE DRIVER
12V
OUT
, 240W Converter Efficiency
TYPICAL APPLICATIO
U
CURRENT (A)
0
E
95
90
85
80
75
16
3722 TA01b
4
2
6
10
14
18
8
12
20
36V
IN
72V
IN
48V
IN
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